George a



(No Model.)

GQ A. MOILHENNY.

.DIP PIPE.

Patented Sept. 20, 1881.

UNITED STATES g PATENT OFFICE.

GEORGE A. MOILHENNY, OF WASHINGTON, DISTBIOT OF OOLUMBIA.

DIP-PIPE.

SPECIFIGATION forming part of LettersV I'atent No. 247,386, datedSeptember 20, 1881. Application filed July G, 1881. (No model.)

.To all rwhom 'it may concern:

Be it known that I, GEORGE A. MOILHENNY,

of Washington, in the District of Columbia,

draulic main, and encircling the upper end ofl the ascension-pipe,which, under my construction, rises through the bottom of the main, saiddip-pipe being provided with a removable lid or cover, and with a valve,whereby communication may be established or cut ofl' between itsinterior and the open space of the hydraulic main.

The accompanying drawing represents a vertical central section of myapparatns.

'Ihe object of my invention is to cheapen the construction of theapparatus, to facilitatc the cleaning or-clearing ot' the pipes, and toprovide means for instantly sealing or unsealing any dip-pipe of theseries and its corresponding retort.

To this end I construct the parts as shown in the drawing, in which Arepresents the hydraulic main, B the ascension-pipe passing up throughthe bottom of the main and rising to a proper height above the liquidtherein, and O the dip-pipe passing down through the top of the main,encircling the upper end of the ascension-pipe, and dippinginto theliquid to a sutticient distance to eftectually seal the pipe. Under thisarrangement the gas arising in the ascension-pipe will pass out at thetop of the same and descend through the annular space ct between saidpipe and the encircling dip-pipe to the liquid, through which, unlessother escape be afl'orded, it will force-its way beneath the lower endof the dip-pipe and up into the open space of the main, whence it willpass through the intermediate parts ot' the apparatus to the gas-holder.

. For the purpose of permitting the ascension and dip pipes to bereadily cleaned or cleared of obstructions the latter is furnished witha removable lid,D, which maybe secured in place in any suitable manner,but which is preferably formed with a beveled edge to fit a mouth ofcorrespondin g form, and held to said mouth or seat by a screw, E,hearing upon it at the center,in the same manner as the lids ofgasretorts are secured in place.

In order that the dip-pipes may be readily sealed or unsealed,I provideeach With avalve, F, in its side at a point above the liquid in themain, and furnish said valvewith an operating-stem, G, Which passesthrough a stutfingbox, H, and is preterably'connected with anactuating-lever, I.

It will be seen that by simply opening or closing the Valve freecommunication may be established or cut off between the ascensionpipeand the hydraulic main quickly and With case. and Without moving oradjusting the dippipe. It will also be seen that When the Valve isclosed the gas may escape beneath the end of the dip-pipe, as usual,though prevented from returning to the ascension-pipe by reason of therise of the sea-ling liquid in the annular space a, when the pressurefrom within the ascension-pipe ceases.

Under the above construction each retortot' the entire series may besealed or unsealed without affecting others of the series, and eachascension pipe may be readily reached for cleaning without removing thedip-pipe or disturbin g the Valve and its fixtures.

I am aware that the ascension pipe has hitherto been arranged to pass upthrough the bottom of the hydraulic main; that the dippipe usedtherewith has been provided with a removable lid, and that a valve hasbeen applied to`a dip-pipe for the purpose of sealing and unsealing thesame; hence [do not claim these features per se but What I do claim isl.`In combination With an ascension -pipe passing upward through thebottom of the hydraulic main, a dip-pipe descending through the top ofthe main and encircling the ascension-pipe, and provided with a valvewhereby communication may be opened or closed between the ascension pipeand the main, substantially as set i'orth.

2. In combination with an ascension-pipe passing upward through thebottom of the hydraulic main, a dip-pipe descending through the top ofthe main and encircling the ascension-pipe, provided'with a removablelid, and

with a Valve, whereby communication maybe' established between theascension -pipe and the main.

GEORGE A MCILHENNY.

